./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:22:01,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:22:01,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:22:01,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:22:01,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:22:01,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:22:01,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:22:01,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:22:01,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:22:01,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:22:01,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:22:01,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:22:01,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:22:01,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:22:01,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:22:01,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:22:01,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:22:01,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:22:01,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:22:01,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:22:01,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:22:01,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:22:01,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:22:01,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:22:01,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:22:01,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:22:01,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:22:01,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:22:01,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:22:01,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:22:01,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:22:01,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:22:01,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:22:01,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:22:01,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:22:01,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:22:01,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:22:01,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:22:01,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:22:01,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:22:01,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:22:01,852 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:22:01,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:22:01,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:22:01,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:22:01,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:22:01,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:22:01,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:22:01,909 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:22:01,909 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:22:01,910 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:22:01,910 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:22:01,911 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:22:01,912 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:22:01,912 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:22:01,912 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:22:01,913 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:22:01,913 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:22:01,913 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:22:01,914 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:22:01,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:22:01,915 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:22:01,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:22:01,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:22:01,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:22:01,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:22:01,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:22:01,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:22:01,919 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:22:01,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:22:01,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:22:01,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:22:01,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:22:01,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:22:01,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:22:01,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:22:01,922 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:22:01,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:22:01,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:22:01,923 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:22:01,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:22:01,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:22:01,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:22:01,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2022-11-03 02:22:02,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:22:02,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:22:02,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:22:02,321 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:22:02,322 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:22:02,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-03 02:22:02,405 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/data/424bd9ba4/c26bb72f0de540b691553a950b1f276f/FLAGa2d0d3b8e [2022-11-03 02:22:03,029 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:22:03,030 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2022-11-03 02:22:03,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/data/424bd9ba4/c26bb72f0de540b691553a950b1f276f/FLAGa2d0d3b8e [2022-11-03 02:22:03,345 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/data/424bd9ba4/c26bb72f0de540b691553a950b1f276f [2022-11-03 02:22:03,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:22:03,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:22:03,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:22:03,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:22:03,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:22:03,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9ab10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03, skipping insertion in model container [2022-11-03 02:22:03,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:22:03,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:22:03,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-03 02:22:03,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:22:03,697 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:22:03,714 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2022-11-03 02:22:03,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:22:03,741 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:22:03,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03 WrapperNode [2022-11-03 02:22:03,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:22:03,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:22:03,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:22:03,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:22:03,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,801 INFO L138 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2022-11-03 02:22:03,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:22:03,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:22:03,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:22:03,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:22:03,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:22:03,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:22:03,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:22:03,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:22:03,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (1/1) ... [2022-11-03 02:22:03,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:22:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:03,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:22:03,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:22:03,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:22:03,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:22:03,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:22:03,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:22:03,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:22:03,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:22:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:22:03,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:22:04,059 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:22:04,062 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:22:04,278 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:22:04,407 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:22:04,422 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:22:04,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:22:04 BoogieIcfgContainer [2022-11-03 02:22:04,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:22:04,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:22:04,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:22:04,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:22:04,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:22:03" (1/3) ... [2022-11-03 02:22:04,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfb5496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:22:04, skipping insertion in model container [2022-11-03 02:22:04,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:22:03" (2/3) ... [2022-11-03 02:22:04,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfb5496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:22:04, skipping insertion in model container [2022-11-03 02:22:04,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:22:04" (3/3) ... [2022-11-03 02:22:04,452 INFO L112 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2022-11-03 02:22:04,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:22:04,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:22:04,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:22:04,592 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b5ef67f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:22:04,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:22:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:22:04,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:04,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:04,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash 721191376, now seen corresponding path program 1 times [2022-11-03 02:22:04,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:04,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007438996] [2022-11-03 02:22:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:04,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:04,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:04,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007438996] [2022-11-03 02:22:04,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007438996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:04,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:04,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:04,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645862353] [2022-11-03 02:22:04,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:05,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:05,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:05,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:05,047 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:05,146 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-03 02:22:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:05,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 02:22:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:05,166 INFO L225 Difference]: With dead ends: 27 [2022-11-03 02:22:05,167 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 02:22:05,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:05,180 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:05,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 02:22:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 11. [2022-11-03 02:22:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-03 02:22:05,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2022-11-03 02:22:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:05,244 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-03 02:22:05,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-11-03 02:22:05,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:22:05,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:05,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:05,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:22:05,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:05,251 INFO L85 PathProgramCache]: Analyzing trace with hash 801657582, now seen corresponding path program 1 times [2022-11-03 02:22:05,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:05,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389936229] [2022-11-03 02:22:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:05,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:05,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:05,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389936229] [2022-11-03 02:22:05,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389936229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:05,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81185105] [2022-11-03 02:22:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:05,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:05,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:05,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:05,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:22:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:22:05,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:22:05,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:05,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81185105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:05,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:05,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 02:22:05,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703683298] [2022-11-03 02:22:05,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:05,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:05,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:05,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:22:05,566 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:05,592 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2022-11-03 02:22:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:05,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:22:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:05,596 INFO L225 Difference]: With dead ends: 21 [2022-11-03 02:22:05,596 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 02:22:05,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:22:05,605 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:05,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:22:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 02:22:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 02:22:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-03 02:22:05,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-03 02:22:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:05,618 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-03 02:22:05,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-03 02:22:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:22:05,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:05,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:05,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:05,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:05,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:05,844 INFO L85 PathProgramCache]: Analyzing trace with hash -299864784, now seen corresponding path program 1 times [2022-11-03 02:22:05,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:05,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616150659] [2022-11-03 02:22:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:05,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:22:06,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616150659] [2022-11-03 02:22:06,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616150659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148226458] [2022-11-03 02:22:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:06,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:06,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:06,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:06,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:22:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:06,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:22:06,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:22:06,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:22:06,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148226458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:06,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155901666] [2022-11-03 02:22:06,225 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:06,228 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:06,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:06,249 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:06,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:06,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:06,369 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:22:06,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:22:06,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:06,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:22:06,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:06,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:22:06,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:06,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:06,677 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:22:06,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:22:07,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:07,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:07,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:07,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:07,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:07,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-03 02:22:07,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534393527] [2022-11-03 02:22:07,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:07,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:22:07,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:07,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:22:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:22:07,690 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:07,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:07,778 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-11-03 02:22:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:22:07,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:22:07,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:07,781 INFO L225 Difference]: With dead ends: 39 [2022-11-03 02:22:07,782 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 02:22:07,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:22:07,791 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:07,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:07,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 02:22:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 16. [2022-11-03 02:22:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-03 02:22:07,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-11-03 02:22:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:07,805 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-03 02:22:07,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-03 02:22:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:22:07,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:07,807 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:07,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:08,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:08,023 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:08,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 751908112, now seen corresponding path program 2 times [2022-11-03 02:22:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:08,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175614023] [2022-11-03 02:22:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:08,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:22:08,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175614023] [2022-11-03 02:22:08,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175614023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050393803] [2022-11-03 02:22:08,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:22:08,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:08,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:08,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:08,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:22:08,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:22:08,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:08,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:22:08,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:22:08,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:22:08,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050393803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:08,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1735674570] [2022-11-03 02:22:08,371 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:08,371 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:08,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:08,372 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:08,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:08,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:08,420 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:22:08,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:22:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:08,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:22:08,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:08,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:22:08,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:08,598 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:22:08,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 226 [2022-11-03 02:22:08,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:08,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:09,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '357#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:09,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:09,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:09,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-03 02:22:09,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225446459] [2022-11-03 02:22:09,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:09,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:22:09,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:09,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:22:09,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:22:09,190 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:09,291 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-11-03 02:22:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:22:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 02:22:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:09,294 INFO L225 Difference]: With dead ends: 63 [2022-11-03 02:22:09,294 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 02:22:09,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:22:09,298 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:09,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 35 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:09,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 02:22:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 20. [2022-11-03 02:22:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-03 02:22:09,314 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2022-11-03 02:22:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:09,315 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-03 02:22:09,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-03 02:22:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:22:09,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:09,317 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:09,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:09,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:09,543 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1111495536, now seen corresponding path program 3 times [2022-11-03 02:22:09,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006637567] [2022-11-03 02:22:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:09,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:22:09,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:09,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006637567] [2022-11-03 02:22:09,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006637567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:09,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562602060] [2022-11-03 02:22:09,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:22:09,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:09,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:09,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:09,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:22:09,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:22:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:22:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:22:09,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:22:10,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562602060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:10,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225880540] [2022-11-03 02:22:10,025 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:10,025 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:10,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:10,026 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:10,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:10,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:10,075 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:22:10,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:22:10,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:10,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:22:10,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:10,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:22:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:10,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:10,259 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:22:10,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:22:10,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:10,524 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:10,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '593#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:10,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:10,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:10,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2022-11-03 02:22:10,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31420747] [2022-11-03 02:22:10,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:10,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:22:10,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:10,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:22:10,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:22:10,866 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:10,979 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-11-03 02:22:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:22:10,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 02:22:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:10,981 INFO L225 Difference]: With dead ends: 90 [2022-11-03 02:22:10,981 INFO L226 Difference]: Without dead ends: 76 [2022-11-03 02:22:10,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:22:10,982 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 161 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:10,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 55 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-03 02:22:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 27. [2022-11-03 02:22:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-03 02:22:10,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-11-03 02:22:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:10,989 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-03 02:22:10,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-03 02:22:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:22:10,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:10,991 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:11,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:11,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:11,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:11,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:11,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1942026478, now seen corresponding path program 4 times [2022-11-03 02:22:11,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124548184] [2022-11-03 02:22:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:11,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 02:22:11,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124548184] [2022-11-03 02:22:11,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124548184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:11,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309889045] [2022-11-03 02:22:11,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:22:11,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:11,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:11,455 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:11,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:22:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:22:11,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:22:11,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:22:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309889045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305702339] [2022-11-03 02:22:12,166 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:12,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:12,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:12,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:12,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:12,204 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:22:12,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 02:22:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:12,242 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:22:12,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:22:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:12,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:22:12,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:12,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:12,390 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:22:12,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:22:12,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:12,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:13,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '940#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:13,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:13,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:13,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2022-11-03 02:22:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996012984] [2022-11-03 02:22:13,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:13,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 02:22:13,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 02:22:13,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:22:13,042 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:13,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:13,233 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2022-11-03 02:22:13,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:22:13,234 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-03 02:22:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:13,240 INFO L225 Difference]: With dead ends: 111 [2022-11-03 02:22:13,240 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 02:22:13,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:22:13,243 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 147 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:13,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 60 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:22:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 02:22:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 40. [2022-11-03 02:22:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-11-03 02:22:13,261 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2022-11-03 02:22:13,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:13,261 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-11-03 02:22:13,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-11-03 02:22:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:22:13,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:13,263 INFO L195 NwaCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:13,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:13,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:22:13,464 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:13,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1369821680, now seen corresponding path program 5 times [2022-11-03 02:22:13,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:13,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458281263] [2022-11-03 02:22:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:13,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-03 02:22:13,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:13,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458281263] [2022-11-03 02:22:13,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458281263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:13,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257615640] [2022-11-03 02:22:13,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:22:13,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:13,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:13,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:13,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:22:13,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:22:13,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:13,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:22:13,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-03 02:22:13,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-03 02:22:14,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257615640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:14,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748118742] [2022-11-03 02:22:14,175 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:14,176 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:14,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:14,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:14,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:14,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:14,212 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:22:14,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 02:22:14,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:14,243 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:22:14,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:22:14,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:14,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:22:14,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:14,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:14,399 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:22:14,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:22:14,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:14,623 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:14,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1416#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:14,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:14,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:14,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-03 02:22:14,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616845286] [2022-11-03 02:22:14,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:14,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:22:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:22:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=365, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:22:14,902 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:15,116 INFO L93 Difference]: Finished difference Result 177 states and 208 transitions. [2022-11-03 02:22:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:22:15,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-03 02:22:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:15,122 INFO L225 Difference]: With dead ends: 177 [2022-11-03 02:22:15,123 INFO L226 Difference]: Without dead ends: 170 [2022-11-03 02:22:15,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=365, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:22:15,125 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 273 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:15,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 90 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:22:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-03 02:22:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 50. [2022-11-03 02:22:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-11-03 02:22:15,138 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 37 [2022-11-03 02:22:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:15,139 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-11-03 02:22:15,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-11-03 02:22:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:22:15,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:15,144 INFO L195 NwaCegarLoop]: trace histogram [22, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:15,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:15,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:15,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash 190263504, now seen corresponding path program 6 times [2022-11-03 02:22:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665273886] [2022-11-03 02:22:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-03 02:22:16,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665273886] [2022-11-03 02:22:16,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665273886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:16,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851824730] [2022-11-03 02:22:16,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:22:16,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:16,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:16,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:16,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:22:16,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:22:16,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:22:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-03 02:22:17,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-03 02:22:18,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851824730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:18,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692068171] [2022-11-03 02:22:18,317 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:18,317 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:18,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:18,318 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:18,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:18,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:18,356 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:22:18,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 02:22:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:18,393 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:22:18,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:22:18,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:18,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:22:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:18,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:18,577 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:22:18,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:22:18,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:18,856 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:19,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2096#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:19,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:19,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:19,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 67 [2022-11-03 02:22:19,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111691660] [2022-11-03 02:22:19,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:19,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 02:22:19,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:19,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 02:22:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1412, Invalid=3700, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 02:22:19,302 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:19,603 INFO L93 Difference]: Finished difference Result 234 states and 283 transitions. [2022-11-03 02:22:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-03 02:22:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-03 02:22:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:19,606 INFO L225 Difference]: With dead ends: 234 [2022-11-03 02:22:19,606 INFO L226 Difference]: Without dead ends: 208 [2022-11-03 02:22:19,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1412, Invalid=3700, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 02:22:19,609 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 406 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:19,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 115 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:22:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-03 02:22:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 75. [2022-11-03 02:22:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:19,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-03 02:22:19,636 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 47 [2022-11-03 02:22:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:19,636 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-03 02:22:19,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-03 02:22:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 02:22:19,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:19,640 INFO L195 NwaCegarLoop]: trace histogram [46, 19, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:19,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 02:22:19,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:19,867 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:19,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1442170606, now seen corresponding path program 7 times [2022-11-03 02:22:19,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:19,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330207640] [2022-11-03 02:22:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:19,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-03 02:22:20,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:20,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330207640] [2022-11-03 02:22:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330207640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264869294] [2022-11-03 02:22:20,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:22:20,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:20,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:20,803 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:20,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:22:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:20,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:22:21,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-03 02:22:23,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-03 02:22:27,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264869294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:27,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960027481] [2022-11-03 02:22:27,223 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:27,223 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:27,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:27,224 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:27,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,255 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:22:27,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 02:22:27,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,288 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:22:27,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:22:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:22:27,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:27,417 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:22:27,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:22:27,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:27,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:28,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3127#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:28,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:28,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:28,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 48, 48] total 116 [2022-11-03 02:22:28,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464213822] [2022-11-03 02:22:28,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:28,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-11-03 02:22:28,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:28,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-11-03 02:22:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4868, Invalid=9652, Unknown=0, NotChecked=0, Total=14520 [2022-11-03 02:22:28,216 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:28,673 INFO L93 Difference]: Finished difference Result 291 states and 365 transitions. [2022-11-03 02:22:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-03 02:22:28,674 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-03 02:22:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:28,676 INFO L225 Difference]: With dead ends: 291 [2022-11-03 02:22:28,676 INFO L226 Difference]: Without dead ends: 264 [2022-11-03 02:22:28,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2635 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4868, Invalid=9652, Unknown=0, NotChecked=0, Total=14520 [2022-11-03 02:22:28,681 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 357 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:28,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 140 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:22:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-03 02:22:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 124. [2022-11-03 02:22:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-11-03 02:22:28,695 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 72 [2022-11-03 02:22:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:28,696 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-11-03 02:22:28,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-11-03 02:22:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:22:28,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:28,699 INFO L195 NwaCegarLoop]: trace histogram [94, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:28,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:28,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:28,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:28,913 INFO L85 PathProgramCache]: Analyzing trace with hash 592374672, now seen corresponding path program 8 times [2022-11-03 02:22:28,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:28,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15082154] [2022-11-03 02:22:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:28,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4675 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-03 02:22:30,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:30,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15082154] [2022-11-03 02:22:30,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15082154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:30,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532527696] [2022-11-03 02:22:30,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:22:30,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:30,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:30,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:30,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:22:31,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-03 02:22:31,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:31,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:22:31,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4675 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-03 02:22:31,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4675 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-03 02:22:32,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532527696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:32,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081026915] [2022-11-03 02:22:32,117 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:32,118 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:32,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:32,118 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:32,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:32,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,155 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:22:32,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:22:32,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:22:32,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:22:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:32,335 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:22:32,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:22:32,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:32,569 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:32,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4587#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:32,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:32,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:32,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-03 02:22:32,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890341463] [2022-11-03 02:22:32,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-03 02:22:32,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-03 02:22:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=1313, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:22:32,889 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:33,462 INFO L93 Difference]: Finished difference Result 441 states and 508 transitions. [2022-11-03 02:22:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 02:22:33,463 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-03 02:22:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:33,465 INFO L225 Difference]: With dead ends: 441 [2022-11-03 02:22:33,465 INFO L226 Difference]: Without dead ends: 434 [2022-11-03 02:22:33,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1137, Invalid=1313, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:22:33,467 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 966 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:33,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 210 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:22:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-03 02:22:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 146. [2022-11-03 02:22:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-11-03 02:22:33,484 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 121 [2022-11-03 02:22:33,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:33,485 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-11-03 02:22:33,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-11-03 02:22:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 02:22:33,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:33,487 INFO L195 NwaCegarLoop]: trace histogram [94, 42, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:33,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:33,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:22:33,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash -409594672, now seen corresponding path program 9 times [2022-11-03 02:22:33,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:33,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330380496] [2022-11-03 02:22:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:33,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-03 02:22:36,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:36,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330380496] [2022-11-03 02:22:36,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330380496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:36,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84327314] [2022-11-03 02:22:36,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:22:36,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:36,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:36,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:36,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:22:37,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:22:37,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:37,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-03 02:22:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-11-03 02:22:44,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-11-03 02:22:58,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84327314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:58,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929765749] [2022-11-03 02:22:58,853 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:22:58,853 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:58,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:58,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:58,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:58,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:58,880 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:22:58,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 02:22:58,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:58,907 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:22:58,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:22:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:58,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:22:59,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:59,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:59,020 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:22:59,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 226 [2022-11-03 02:22:59,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:59,183 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:59,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6587#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:59,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:59,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:59,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 96, 96] total 235 [2022-11-03 02:22:59,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401289754] [2022-11-03 02:22:59,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:59,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-11-03 02:22:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-11-03 02:22:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19472, Invalid=37888, Unknown=0, NotChecked=0, Total=57360 [2022-11-03 02:22:59,948 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 235 states, 235 states have (on average 1.0382978723404255) internal successors, (244), 235 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:23:01,315 INFO L93 Difference]: Finished difference Result 594 states and 739 transitions. [2022-11-03 02:23:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-11-03 02:23:01,316 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.0382978723404255) internal successors, (244), 235 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-03 02:23:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:23:01,319 INFO L225 Difference]: With dead ends: 594 [2022-11-03 02:23:01,319 INFO L226 Difference]: Without dead ends: 544 [2022-11-03 02:23:01,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9733 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=19472, Invalid=37888, Unknown=0, NotChecked=0, Total=57360 [2022-11-03 02:23:01,325 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1162 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:23:01,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 250 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:23:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-11-03 02:23:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 243. [2022-11-03 02:23:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-11-03 02:23:01,348 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 143 [2022-11-03 02:23:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:23:01,349 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-11-03 02:23:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.0382978723404255) internal successors, (244), 235 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:23:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-11-03 02:23:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-03 02:23:01,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:23:01,353 INFO L195 NwaCegarLoop]: trace histogram [190, 43, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:23:01,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:23:01,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:23:01,567 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:23:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:23:01,567 INFO L85 PathProgramCache]: Analyzing trace with hash -427545618, now seen corresponding path program 10 times [2022-11-03 02:23:01,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:23:01,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253658203] [2022-11-03 02:23:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:23:01,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:23:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 19091 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-11-03 02:23:05,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:23:05,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253658203] [2022-11-03 02:23:05,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253658203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:23:05,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762648041] [2022-11-03 02:23:05,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:23:05,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:23:05,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:23:05,830 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:23:05,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:23:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:23:06,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 194 conjunts are in the unsatisfiable core [2022-11-03 02:23:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:23:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 19091 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-03 02:23:29,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19091 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-03 02:24:29,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762648041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294337978] [2022-11-03 02:24:29,111 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:24:29,111 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:24:29,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:24:29,112 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:24:29,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:24:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:29,145 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:24:29,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 02:24:29,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:29,176 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:24:29,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:24:29,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:29,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:24:29,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:29,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:24:29,297 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:24:29,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:24:29,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:24:29,487 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:24:30,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9850#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:24:30,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:24:30,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:24:30,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 192, 192] total 428 [2022-11-03 02:24:30,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274712746] [2022-11-03 02:24:30,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:24:30,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 428 states [2022-11-03 02:24:30,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:24:30,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 428 interpolants. [2022-11-03 02:24:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74720, Invalid=112336, Unknown=0, NotChecked=0, Total=187056 [2022-11-03 02:24:30,732 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 428 states, 428 states have (on average 1.0210280373831775) internal successors, (437), 428 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:24:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:34,880 INFO L93 Difference]: Finished difference Result 795 states and 1037 transitions. [2022-11-03 02:24:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 428 states. [2022-11-03 02:24:34,882 INFO L78 Accepts]: Start accepts. Automaton has has 428 states, 428 states have (on average 1.0210280373831775) internal successors, (437), 428 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2022-11-03 02:24:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:34,886 INFO L225 Difference]: With dead ends: 795 [2022-11-03 02:24:34,886 INFO L226 Difference]: Without dead ends: 744 [2022-11-03 02:24:34,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19627 ImplicationChecksByTransitivity, 83.6s TimeCoverageRelationStatistics Valid=74720, Invalid=112336, Unknown=0, NotChecked=0, Total=187056 [2022-11-03 02:24:34,902 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1330 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:34,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1330 Valid, 270 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:24:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-11-03 02:24:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 436. [2022-11-03 02:24:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.0091954022988505) internal successors, (439), 435 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:24:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 439 transitions. [2022-11-03 02:24:34,955 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 439 transitions. Word has length 240 [2022-11-03 02:24:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:34,957 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 439 transitions. [2022-11-03 02:24:34,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 428 states, 428 states have (on average 1.0210280373831775) internal successors, (437), 428 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:24:34,958 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 439 transitions. [2022-11-03 02:24:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-03 02:24:34,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:34,968 INFO L195 NwaCegarLoop]: trace histogram [382, 44, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:24:35,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-03 02:24:35,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:35,183 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:35,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1080218768, now seen corresponding path program 11 times [2022-11-03 02:24:35,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:35,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595385524] [2022-11-03 02:24:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:35,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 74143 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-03 02:24:41,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:41,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595385524] [2022-11-03 02:24:41,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595385524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:41,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435197368] [2022-11-03 02:24:41,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:24:41,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:41,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:41,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:41,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:25:04,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-03 02:25:04,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:25:04,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:25:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 74143 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-03 02:25:05,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 74143 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-03 02:25:08,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435197368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:08,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741302985] [2022-11-03 02:25:08,020 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:25:08,020 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:25:08,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:25:08,020 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:25:08,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:25:08,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:08,055 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:25:08,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 02:25:08,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:08,084 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:25:08,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:25:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:08,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:25:08,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:25:08,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:25:08,192 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:25:08,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:25:08,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:25:08,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:25:08,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14718#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:25:08,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:25:08,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:25:08,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-03 02:25:08,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354392625] [2022-11-03 02:25:08,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:25:08,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-03 02:25:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-03 02:25:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4569, Invalid=4937, Unknown=0, NotChecked=0, Total=9506 [2022-11-03 02:25:08,758 INFO L87 Difference]: Start difference. First operand 436 states and 439 transitions. Second operand has 93 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:11,764 INFO L93 Difference]: Finished difference Result 1113 states and 1252 transitions. [2022-11-03 02:25:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-03 02:25:11,765 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2022-11-03 02:25:11,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:11,772 INFO L225 Difference]: With dead ends: 1113 [2022-11-03 02:25:11,772 INFO L226 Difference]: Without dead ends: 1106 [2022-11-03 02:25:11,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1344 GetRequests, 1248 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4569, Invalid=4937, Unknown=0, NotChecked=0, Total=9506 [2022-11-03 02:25:11,774 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2569 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:11,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2569 Valid, 450 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:25:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-11-03 02:25:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 482. [2022-11-03 02:25:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.0083160083160083) internal successors, (485), 481 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 485 transitions. [2022-11-03 02:25:11,815 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 485 transitions. Word has length 433 [2022-11-03 02:25:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:11,816 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 485 transitions. [2022-11-03 02:25:11,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:25:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 485 transitions. [2022-11-03 02:25:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-11-03 02:25:11,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:11,829 INFO L195 NwaCegarLoop]: trace histogram [382, 90, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:11,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:25:12,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:25:12,030 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:12,031 INFO L85 PathProgramCache]: Analyzing trace with hash 155912912, now seen corresponding path program 12 times [2022-11-03 02:25:12,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:12,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149523250] [2022-11-03 02:25:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:12,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 77248 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-11-03 02:25:24,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:24,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149523250] [2022-11-03 02:25:24,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149523250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:24,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317319544] [2022-11-03 02:25:24,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:25:24,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:24,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:24,604 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:24,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:25:25,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:25:25,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:25:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 3865 conjuncts, 386 conjunts are in the unsatisfiable core [2022-11-03 02:25:25,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 77248 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2022-11-03 02:27:04,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 77248 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2022-11-03 02:31:07,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317319544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:07,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789010570] [2022-11-03 02:31:07,939 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:31:07,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:07,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:07,940 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:07,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:07,986 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:31:07,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 02:31:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:08,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:31:08,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:08,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:31:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:31:08,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:31:08,122 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:31:08,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 228 treesize of output 227 [2022-11-03 02:31:08,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:31:08,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:10,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21086#(and (<= |ULTIMATE.start_init_~size#1| 1000000) (<= |ULTIMATE.start_init_~a#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_init_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_main_#t~mem6#1| 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1000000 |ULTIMATE.start_init_~size#1|) (<= 0 |ULTIMATE.start_init_#in~a#1.base|) (= |ULTIMATE.start_main_~flag~0#1| 0) (= 1000000 |ULTIMATE.start_init_#in~size#1|) (<= 0 |ULTIMATE.start_init_~a#1.base|) (<= 0 |ULTIMATE.start_init_~a#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 1000000 |ULTIMATE.start_init_~i~0#1|) (<= |ULTIMATE.start_init_#in~a#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:10,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:10,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:10,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 384, 384] total 859 [2022-11-03 02:31:10,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938334573] [2022-11-03 02:31:10,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:10,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 859 states [2022-11-03 02:31:10,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:10,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 859 interpolants. [2022-11-03 02:31:10,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299096, Invalid=446536, Unknown=0, NotChecked=0, Total=745632 [2022-11-03 02:31:10,834 INFO L87 Difference]: Start difference. First operand 482 states and 485 transitions. Second operand has 859 states, 859 states have (on average 1.010477299185099) internal successors, (868), 859 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:44,381 INFO L93 Difference]: Finished difference Result 1602 states and 2083 transitions. [2022-11-03 02:31:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 859 states. [2022-11-03 02:31:44,384 INFO L78 Accepts]: Start accepts. Automaton has has 859 states, 859 states have (on average 1.010477299185099) internal successors, (868), 859 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 479 [2022-11-03 02:31:44,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:44,390 INFO L225 Difference]: With dead ends: 1602 [2022-11-03 02:31:44,391 INFO L226 Difference]: Without dead ends: 1504 [2022-11-03 02:31:44,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 862 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75397 ImplicationChecksByTransitivity, 345.7s TimeCoverageRelationStatistics Valid=299096, Invalid=446536, Unknown=0, NotChecked=0, Total=745632 [2022-11-03 02:31:44,440 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2436 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:44,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2436 Valid, 515 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:31:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-11-03 02:31:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 867. [2022-11-03 02:31:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 1.0046189376443417) internal successors, (870), 866 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 870 transitions. [2022-11-03 02:31:44,496 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 870 transitions. Word has length 479 [2022-11-03 02:31:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:44,497 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 870 transitions. [2022-11-03 02:31:44,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 859 states, 859 states have (on average 1.010477299185099) internal successors, (868), 859 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 870 transitions. [2022-11-03 02:31:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 865 [2022-11-03 02:31:44,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:44,508 INFO L195 NwaCegarLoop]: trace histogram [766, 91, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:44,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 02:31:44,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:31:44,727 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1821841902, now seen corresponding path program 13 times [2022-11-03 02:31:44,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631095663] [2022-11-03 02:31:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:44,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 297947 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 293761 trivial. 0 not checked. [2022-11-03 02:32:04,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:04,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631095663] [2022-11-03 02:32:04,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631095663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:04,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15676707] [2022-11-03 02:32:04,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:32:04,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:04,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:04,185 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:04,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31612b1c-18fe-4ef1-81f5-3452507d19bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:32:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:06,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 7325 conjuncts, 770 conjunts are in the unsatisfiable core [2022-11-03 02:32:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates...